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| 1 # Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 # Use of this source code is governed by a BSD-style license that can be | |
| 3 # found in the LICENSE file. | |
| 4 | |
| 5 class Interface(object): | |
| 6 def __init__(self): | |
| 7 self.functions = [] | |
| 8 | |
| 9 def Func(self, name, return_type): | |
| 10 f = Function(self, len(self.functions), name, return_type) | |
| 11 self.functions.append(f) | |
| 12 return f | |
| 13 | |
| 14 def Finalize(self): | |
| 15 for f in self.functions: | |
| 16 f.Finalize() | |
| 17 | |
| 18 class Function(object): | |
| 19 def __init__(self, parent, uid, name, return_type): | |
| 20 self.parent = parent | |
| 21 self.uid = uid | |
| 22 self.name = name | |
| 23 self.return_type = return_type | |
| 24 self.params = [] | |
| 25 self.param_by_name = {} | |
| 26 self.result_param = None | |
| 27 self.broken_in_nacl = False | |
| 28 | |
| 29 def Param(self, name, param_type=None): | |
| 30 p = Param(self, len(self.params), name, param_type) | |
| 31 self.params.append(p) | |
| 32 self.param_by_name[name] = p | |
| 33 return p | |
| 34 | |
| 35 def ParamList(self): | |
| 36 return [param.param_type + ' ' + param.name for param in self.params] | |
| 37 | |
| 38 def ParamDecl(self): | |
| 39 if self.params: | |
| 40 return ', '.join(self.ParamList()) | |
| 41 else: | |
| 42 return 'void' | |
| 43 | |
| 44 def IsBrokenInNaCl(self): | |
| 45 self.broken_in_nacl = True | |
| 46 | |
| 47 def Finalize(self): | |
| 48 self.result_param = Param(self, len(self.params), 'result') | |
| 49 self.result_param.Out(self.return_type).AlwaysWritten() | |
| 50 | |
| 51 class Param(object): | |
| 52 def __init__(self, parent, uid, name, param_type=None): | |
| 53 self.parent = parent | |
| 54 self.uid = uid | |
| 55 self.name = name | |
| 56 self.base_type = param_type | |
| 57 self.param_type = param_type | |
| 58 self.size = None | |
| 59 self.is_input = False | |
| 60 self.is_output = False | |
| 61 self.is_array = False | |
| 62 self.is_struct = False | |
| 63 self.is_extensible = False | |
| 64 self.is_optional = False | |
| 65 self.is_always_written = False | |
| 66 self.is_pointer = False | |
| 67 | |
| 68 def GetSizeParam(self): | |
| 69 assert self.size | |
| 70 return self.parent.param_by_name[self.size] | |
| 71 | |
| 72 def In(self, ty): | |
| 73 self.base_type = ty | |
| 74 self.param_type = ty | |
| 75 self.is_input = True | |
| 76 self.is_pointer = ty.endswith('*') | |
| 77 return self | |
| 78 | |
| 79 def InArray(self, ty, size): | |
| 80 self.base_type = ty | |
| 81 self.param_type = 'const ' + ty + '*' | |
| 82 self.size = size | |
| 83 self.is_input = True | |
| 84 self.is_array = True | |
| 85 return self | |
| 86 | |
| 87 # An "extensible" struct is one where we don't know the exact size - rather | |
| 88 # the first 4 bytes of the struct declare the length of the struct. This | |
| 89 # allows forwards and backwards compatibility with additive changes to the | |
| 90 # structure definition. | |
| 91 def InExtensibleStruct(self, ty): | |
| 92 self.base_type = ty | |
| 93 self.param_type = 'const struct ' + ty + '*' | |
| 94 self.is_input = True | |
| 95 self.is_struct = True | |
| 96 self.is_extensible = True | |
| 97 return self | |
| 98 | |
| 99 def InOut(self, ty): | |
| 100 self.base_type = ty | |
| 101 self.param_type = ty + '*' | |
| 102 self.is_input = True | |
| 103 self.is_output = True | |
| 104 self.is_pointer = ty.endswith('*') | |
| 105 return self | |
| 106 | |
| 107 def Out(self, ty): | |
| 108 self.base_type = ty | |
| 109 self.param_type = ty + '*' | |
| 110 self.is_output = True | |
| 111 self.is_pointer = ty.endswith('*') | |
| 112 return self | |
| 113 | |
| 114 def OutArray(self, ty, size): | |
| 115 self.base_type = ty | |
| 116 self.param_type = ty + '*' | |
| 117 self.size = size | |
| 118 self.is_array = True | |
| 119 self.is_output = True | |
| 120 return self | |
| 121 | |
| 122 # Out extensible structs have an input size indicating the buffer size. On | |
| 123 # success, the size actually written is indicated in the struct. | |
| 124 def OutExtensibleStruct(self, ty, size): | |
| 125 self.base_type = ty | |
| 126 self.param_type = 'struct ' + ty + '*' | |
| 127 self.size = size | |
| 128 self.is_array = False | |
| 129 self.is_output = True | |
| 130 self.is_struct = True | |
| 131 self.is_extensible = True | |
| 132 return self | |
| 133 | |
| 134 # The size of the struct is fixed by the API, it cannot be extended. | |
| 135 def OutFixedStruct(self, ty): | |
| 136 self.base_type = ty | |
| 137 self.param_type = 'struct ' + ty + '*' | |
| 138 self.is_output = True | |
| 139 self.is_struct = True | |
| 140 self.is_extensible = False | |
| 141 return self | |
| 142 | |
| 143 def OutFixedStructArray(self, ty, size): | |
| 144 self.base_type = ty | |
| 145 self.param_type = 'struct ' + ty + '*' | |
| 146 self.size = size | |
| 147 self.is_array = True | |
| 148 self.is_output = True | |
| 149 return self | |
| 150 | |
| 151 # Declares that it is valid to pass a null pointer. | |
| 152 def Optional(self): | |
| 153 assert not self.IsPassedByValue() | |
| 154 self.is_optional = True | |
| 155 return self | |
| 156 | |
| 157 def AlwaysWritten(self): | |
| 158 assert self.is_output, self | |
| 159 self.is_always_written = True | |
| 160 return self | |
| 161 | |
| 162 def IsScalar(self): | |
| 163 return not self.is_array and not self.is_struct | |
| 164 | |
| 165 def IsPassedByValue(self): | |
| 166 return not self.is_output and self.IsScalar() | |
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Chromium Code Reviews
Issue 2051163002:
Nuke NaCl SFI, part 1. (Closed)
Base URL: https://github.com/domokit/mojo.git@master